为了便于定性讨论、分析通电导线在磁场中受到的力与电流的大小、导线长度、磁场强弱间的关系,笔者经过反复研究、实践,制作了简易安培力演示器.该实验装置结构简单、取材容易、操作简便,在课堂上既方便学生动手操作,又适用于教师演示实验,现象明显,教学效果很好.现将该装置的制作和使用方法介绍如下: In order to facilitate the qualitative discussion, the author analyzes the relationship between the force and current, the length of the wire and the strength of the magnetic field of the conducting wire in the magnetic field. After repeated research and practice, the author made the simple ampere demonstrator. The experimental apparatus has the advantages of simple structure, Drawn easily, easy to operate, in the classroom is not only convenient for students to operate, but also for teachers to demonstrate experiments, the phenomenon is obvious, the teaching effect is very good now the device is produced and the use of methods are described below: